The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport.
What temperature was recorded at 9 a.m.?
A. 74°F
B. 72°F
C. 70°F
D. 73°F
Answer: B
Mathematics
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Solve the problem.A bacterial culture has an initial population of 10,000. If its population declines to 4000 in 4 hours, when will its population be 2530? Assume that the population decreases according to the exponential model.
A. after 6 hours B. after 9 hours C. after 5 hours D. after 7 hours
Mathematics
Use implicit differentiation to find dy/dx and d2y/dx2.xy - x + y = 2
A. 
= - 
; 
= 
B. 
= 
; 
= 
C. 
= 
; 
= 
D. 
= - 
; 
= 
Mathematics
Factor the trinomial or state that the trinomial is irreducible.x2 - x - 45
A. (x + 5)(x - 9) B. (x - 45)(x + 1) C. irreducible D. (x - 5)(x + 9)
Mathematics
Find the absolute value.
A. 0
B. - 
C. 
D. 
Mathematics